After upgrading to DP 10.x from DP 9, following issues happen with the SAN (Multipathing) tape library:
[Normal] From: BSM@cell.manager "YYYYYYYYYY" Time: 17/01/2020 8:41:24
Opening MultiPath library control named 'HP_MSL6480_CDR1' on path 'server1;/dev/sg11'.
[Critical] From: BMA@server2 "XXXXXXXXX" Time: 17/01/2020 8:41:24
Cannot open exchanger control device (Interprocess communication problem.)
After checking the network environment, we found out that servers have two nic cards, one for backup and one for production purpose.
on this case, server2 could not contact server1's robotics arm because backup nic's path of server1 was not added to the robotics path.
After adding backup nic's path of server1, problem has been resolved, it should looks like:
[Normal From: BMA@server2 "XXXXXXXXXX" Time: 17/01/2020 8:41:24